base can be used for for humanity. >> off camera, crinkle of said he is not speaking for the kremlin, but most experts believe that russia would not be able to build its own station should leave the iss, which nasa now hopes to keep blind through 23. >> can we continue this relationship with russia on the iss indefinitely or at least until 2031? >> that is what is amazing. in the civilian space program, we can have this professional relationship that goes on without a hitch between russians and americans, space fliers while on the face of the earth, the leader of russia is doing in unconscionable invasions of another sovereign country and it's incredible. >> but the space station science mission is very different from the military operations already underway in space. >> zero, ignition. lift off.